Crystallizing apparatus.



' rare. 768,314.

NITEDSTATES Patented August 23, 190 I.

salon VON 'SEEME'N AND Eausr RUHLE OF RHElNFEL'DEN, AND @SKA FALLER, OFBASEL, SWITZERLAND.

CRYSTALLI'ZI'NG APPARATUS.

EGIFICATIQN forming part of Letters Patent No.

7 8,314, dated August 23, '1904t.

Application filed September 15, 1902. Serial No. 123,543, No model.)

i To all whom zit/"mow concern.-

Be'it known that we, Enron VON SEEMEN and l ERNST RnHLE, both subjectsof the King of Prussia, German Emperor, residing at Rheinfelden, andOSKAR FALLER, a subject of the Grand Duke ofBaden, residing. at Basel,Swit- 'zerland, .have invented new and useful Improveinents inCrystallizing Apparatus. of which the following is a specification.

Our invention relates to improvements in crystallizing apparatus; andthe objects of our improvement are, first, to provide in a vessel,whether open or closed, one or several partition-walls reaching downwardto a certain height above the bottom and upward to a certain distancebelowthe level of the liquid, so

. as to form in the vessel one or several crystallizing-spaces ofcomparatively large area, in which the .liquid is allowed to descendslowly,

2o whereby the crystallization is facilitated and. accelerated; second,to provide in otherspaces in the vessel a plurality of closedheatingpockets, into each of which the beating medium, preferably steam,is admitted andfrom which the condensed water is led off, and,. third,to provide in all of said pockets several vertical tubes for allowingthe liquid to circu-late, the total free area of said vertical tubes andthe spaces between said pockets and 3 said partition-walls being smallerthan that of said crystallizingspaces, so as to cause the liquid toascend quickly, and thereby to ac: celerate its evaporation.

We attain these objects by the apparatus illustrated inthe accompanyingdrawings, in f Wl1ich I Figure 1 is a vertical cross-section through anopen rectangular apparatus-havinga single crystallizing-space in itscenter, the section 4 being taken through line 8 2 n v; of Fig. 2.

Fig. 2 is in its upper half a plan of the apparatus shown in Fig. 1 andshows in its lower half horizontal sections in lines m w, 0 y), and 1 1'of: Fig. i. Fig. 3 is a vertical section thro'hgl-i a closed a iparatus,the section being taken "in line w w of Fig. hand Fig. 4 is a horizontalsection in line p2 of Fig. 3.

Similarcharacters of reference refer to similar parts in' several views.

. it will not only c In the open rectangular apparatus shown 5 at Figs.1 and 2 a s'ingle crystallizing-space B is formed by the partition-wallsb 7/, which are supported by several convenient studs (j 9, so that theydo not reach quite down, but to a certain height above the bottom, whilethey reach upward to a certain distance bclow'the level. In the space Aleft between the partition-walls 6 b and the external walls a sev eralclosed pockets or vertical heating vessels cl are arranged, which aresecured to the walls (t and reach neither as fardown nor as far up asthe walls 6, so that they are constantly covered by the liquid. At theirtops the heating vessels are connected to a distributingpipe 6, intowhich the heating medium, pref-v 5 erably'steam, is admitted. They areeach pro vided with two vertical tubes 0 c, which are secured in thesame manner as'ordinary boilertubes and allow the liquid to circulate.The condensed water is collected and led ofi' by a 7 p p f .As thehorizontal area of the-crystallizingspace fi isvlarger than that of thespaces between the pockets d d and the walls 6 6 and of the verticaltubes or, it follows that theliquid on being heated by the steam in thepockets will rise quickly, while in the central space B 001 down alittle, but also it and thus it will comparatively stagnate, While bythe partition-walls o 6]) it is protected against disturbances from theheating-pockets. Bythe quick circulation of the liquid along the pocketsZ (Z or c 0 its evaporation will be accelerated, while by thecomparative stagnation of the liquid in the central space E thecrystallization is greatly hicilitated and accelerated, so that thecrystals are rendered larger, more-uniform, and valuable.

will sink slowly,

Figs. 3 and 4 represent a closed roundap- 9 paratus in which a single.crystallizingspace B isformed in the center by a cylindricalpartition-wall I), which is secured by a suitable number of convenientsupports.

The crystallizing apparatus may be modi; lied in various respectswithout deviating from the spirit of our invention. The appa-- ratus-maybe rectangular or square or round,

.or it may; have any shape, and the partition walls may be varied so asto form one or several crystalfixing-spaces,while in the remainingspaces or parts of the apparatus the heating-pockets are so arranged asto produce the necessary circulation of the liquid.

Having now described our invention, that Which we wish to secure byetters Patent of the United States is- 1. in crystallizing appa stirs,the combination with a vessel adapted to receive the liquid to betreated; partition-walls arranged in said vessel and dividing the latterinto at least two compartments communicating with each other at thelower as Well as at the upper edges of said walls; heating-pocketsarranged in one or" said compartments and forming passages between thelatter and themselves; circulating-pipes extending through said pockets,and means for conducting a heating medium th rough the latter and aroundsaid pipes, substantially as described.

2. in a crystallizing apparatus, the combi nation with a vessel adaptedto receive the liquid to be treated; partition-walls arranged in saidvessel and dividing the latter into at least two compartmentscommunicating with each other below the lower well as above the upperedges of said walls; heating-pockets arranged in one of saidoompartmimts and extending neither as far down nor as far up as the saidwalls, and forming passages between the latter and themselves;circulating-pipcs extending through said pochcts, and means forconducting a heating medium through the latter andaround said-pipes,substzmtially as described.

3. In a crystallizing apparatus, the combination with a vessel 11'adapted to receive the liquid to be treated; partition-walls arranged insaid vessel and dividing the latter into at least one inner and oneouter compnrlinmit A B communicating with each other below the lower aswell as above the upper edges of said walls; separate heating pockets(1' arranged in the outer compartment and extendn g neither as far downnor as far up as the said walls, and forming passages between the latterand themselves, as well as between themselves; verticalcirculating-pipcs xtending through said pockets, and means for con--ducting a heating medium through the latter and around said pipes,substantially as described.

In Witness whereof We have hereunto set our hands in presence of twowitnesses.

ERLGH V SEEMEl. ERNST RUHLE. OSKAR FALLER.

Vditnesscs:

A. LIEBERKNECIIT, A. BoLLnn.

